-Treat Williams (best known for his work on Everwood as Dr. “Andy” Brown) will be guest starring on CSI‘s season 14 finale currently supposed to air on May 7. He will play Sam, who was a Sheriff’s Deputy in the late 1980s and pioneered methods of crime scene investigating that put him way ahead of his time. Now, an old case involving the killing of a 12-year-old resurfaces and he is drawn back into the investigation. http://tvline.com/2014/03/19/csi-season-14-finale-cast-treat-williams/